benchmark database

The main requirements for an operational conceptual and implementation of a Web-based GIS Database Systems are database planning and design, pilot/ benchmark, database construction, acquisition of GIS software followed by integrating GIS System.

Web-GIS操作概念和应用的主要需求在于设计合理的数据库，测试，数据库构建，GIS系统的整合。

The virtual primary key was regarded as the marked benchmark for the relational database instead of the real primary key, and error was introduced in the database specified least significant bit by embeding a binary image watermarking.

本文提出了一种基于虚拟主键的关系数据库水印算法，构建虚拟主键代替真正主键对关系数据库进行标记，引入误差到关系数据库指定的最低有效位LSB中，实现二值图像的水印信息嵌入。

Research on the Method of Benchmark Database by Functional Testing Based on Financial Business Systems

基于金融业务系统的功能测试基准库方法研究

How to efficiently manage and utilize these treasures is the key problem for benchmark database.

如何有效管理和利用这些数据资源是基准数据库要解决的主要问题。

The results of experiments conducted on four benchmark database show that the method in this work has advantage in retrieval efficiency in comparison with several classical algorithms.

在4个通用数据库进行实验证明该方法相对几个经验算法在检索性能上的优势。